Update chatbot_logic.py

chatbot_logic.py

@@ -1,6 +1,7 @@
-from langchain.embeddings import HuggingFaceEmbeddings
-from langchain.vectorstores import Chroma
-from langchain.llms import HuggingFaceHub
+from langchain_community.vectorstores import Chroma
+from langchain_community.embeddings import HuggingFaceEmbeddings
+from langchain_community.llms import HuggingFaceHub 
+from langchain_huggingface import HuggingFaceEndpoint
 from langchain.chains import RetrievalQA
 from knowledge_base import load_vectorstore
 import os